Bobbin holder for fastening yarn bobbins to the bobbin creel of contents to be spun



p 0, 1968 G. TYTGATH 3,400,899

sossm HOLDER FOR FASTENING YARN BOBBINS TO THE BOBBIN CREEL OF CONTENTSTO BE SPUN Filed May 12, 1967 2 Sheets-Sheet 1 INVEMOR GEORGES 7;7'60 THATTORNEYS G. TYTGATH Sept. 10, 1968 3,400,899 BOBBIN 2 Sheets-Sheet 2BOBBIN HOLDER FOR FASTENING YARN BOBBINS TO THE CREEL OF CONTENTS TO BESPUN Filed May 12, 1967 INVENTOR QEORGES 7Y 7'GHTH ATTORNEY5 UnitedStates Patent 3,400,899 BOBBIN HOLDER FOR FASTENING YARN BOB- BINS TOTHE BOBBIN CREEL OF CONTENTS TO BE SPUN Georges Tytgath, Kouterstraat93, Wondelgem, Belgium Filed May 12, 1967, Ser. No. 637,963 Claimspriority, applicaktiigligielgium, May 13, 1966,

4 Claims. 61. 2424302 ABSTRACT OF THE DISCLOSURE A bobbin holder forfastening yarn bobbins to a bobbin This invention relates to a bobbinholder of an essentially cylindrical shape, formed of two hollow shafthalves within which the rolling bearing, the spring brake and twolocking elements are accommodated, the upper and lower ends of saidlocking elements projecting from longitudinal slots formed along thecylindrical body of the bobbin holder. The lower ends of the two lockingelements are for carrying the bobbin body, whereas the upper ends arefor engagement by a centering ring sliding along the cylindrical body ofthe bobbin holder and for being carried to a position wherein saidlocking elements are ready for duty and from which they tend to pass toan operative position owing to the weight thereof.

The late embodiments of bobbin holders have locking elements formed oftwo identical plates located against one another and pivoted to oneanother which, on falling, grip the bobbins within the inner shoulderthereof.

Since the two plates are identical, such embodiments have as a drawbackthe necessity of providing wide longitudinal slots along the body of thebobbin holder so that the ends of said locking elements be permitted toslide along said slots.

As a result, cotton dust penetrates the bobbin holder very easily andthus after some period of time the move ments of the bearing and platesare inhibited.

Generally, bobbin holders are provided with plates with simple clampingfoot. In this case, bobbin holders of a different length are to be useddepending upon whether the bobbins have a short or a long inner neck;otherwise, should only bobbin holders for long neck bobbins be used,short neck bobbins would hang down into the bobbin creel to a too greatextent.

Bobbin holders provided with an inner spring brake have already beencarried out, but for these forms it is still necessary to take away thebobbin holder in order that the brake spring force be changed.

The object of the present invention is to provide a bobbin holderavoiding the above described drawbacks and capable at the same time ofbeing manufactured in large amounts from low cost material and thus witha great economical advantage.

Such a problem is solved as follows:

Instead of two identical plates, provision is made for two differentinterconnected plates, one of which being shorter than the other andwithout the upper end contacting the centering ring. These plates areinterconnected at an accurately determined position allowing the smallerplate to be drawn by the larger plate, so as to render more reliable andrapid the balanced movements of the latter. Thus, the smaller plate iscaused to follow in an opposite direction the balancing movements of thelarger plate due to its guide within the other body half of the bobbinholder.

At the same time, the smaller plate operates to promote the balancingmovements and to stabilize the various positions.

Another object of the present invention is to provide for the adjustmentof the inner brake by means of an adjustable screw without any need fortaking away the bobbin holder.

A third object is to provide plates, in which the feet or lower ends arein the form of steps. Thus, said bobbin holder can grip the long orshort inner neck bobbins, without short neck bobbins hanging down forthis into the bobbin creel to a too great extent and causing a loss ofpositions.

Further details of the bobbin holder according to the present inventionwill be apparent from the following description, reference being made tothe accompanying drawings wherein an embodiment is shown, and moreparticularly:

FIGURE 1 is a side view of the bobbin holder;

FIGURE 2 is a sectional view according to line H-II in FIGURE 1 of thebobbin holder showing the bobbin at clamped position; wherein theclamping element in dotted lines has been added for greater clarity;

FIGURE 3 is a fragmentary sectional view of the bobbin holder, whereinthe clamping elements are shown at retracted position and the clampingelement in dotted lines has been added for greater clarity;

FIGURE 4 is a sectional view according to line IV--IV of FIGURE 1; and

FIGURE 5 is a sectional view according to line V-V of FIGURE 1.

Shaft 1 is so suspended as to be pivoted around a screw 3 the end ofwhich penetrates chamber 2 from the top and being surrounded within saidchamber by braking members and by the other end. connected to the bobbincreel of the machine. Shaft 1 is formed of two separate halves, whichare held together by annular springs 21 and 22.

The two plates 5 and 6 (at clamped bobbin position in FIG. 2), pivotedto each other at 10, can upwardly or downwardly slide, drawn by ring 20engaging the projecting portion 7 of the upper end of plate 6 with rib24. The movement of plates 5 and 6 is guided by feet 11 and projectingportion 7, slidable within the respective slots 4", 4" and 4'. Slots 4'and 4",are on the same plane (FIGS. 4 and 5), whereas slot 4" isarranged on a plane parallel to the plane of the other slots (FIGURE 5).

Onapproaching the end of upward stroke, foot 11 of plate 6, guided byfinger or pin 9, re-enters and with its portion'27 over-rides pin 9, asshown in FIGURE 3. At this position, the two plates 5 and 6 arerestrained at position of FIGURE 3 and the bobbin can be withdrawn.

At the same time, the portion indicated at 8 exits from slot 4, which ison the same plane as slots 4' and 4".

By a further upward drawing movement through ring 20, portion 8 of plate6 will pivot on rib 24, the plates will be removed from the internalposition thereof and sidewise outwardly inclined due to weight thereof.On downward guided movement, the plates; will as far as possible movetheir feet away, which feet are guided by pins 9 and 9', respectively,pin 9 (not shown in the figure) being located on the other half ofshaft 1. The two plates a are-interconnected at 10, so thatone platewill draw the other. Since one plate is shorter than the other and theshortest plate is drawn by the longest one, only the upper end of thelongest plate will project from slots 4 or 4' to provide the attachmentpoints for the drawing movement by ring 20. As a result, the Width ofthe slots is reduced to a half, as each slot is contemplated for thewidth of only one clamping plate.

The feet 11 of plates 5 and 6 are in the form of steps and grip theshort neck bobbins at the upper-most location indicated at 25 and thelong neck bobbins at the lowermost location indicated at 26, this inorder to gain space in the bobbin creel.

The bearing and brake system is arranged within chamber 2 and comprisesball bearing 23, brake disc 12, support spring 13 and brake spring 14.

The assembly is secured to the bobbin creel 15 by a hollow screw 3engaging the support spring 13 by the head thereof.

Inside this hollow screw 3 there is a further screw 16 coaxial thereto,at the bottom having a thread 18 engaging the corresponding threadedinner portion of the hollow screw 3. With the lower portion thereof thebrake spring 14 engages the head of screw 16 and with the upper portionthereof the brake disc 12.-Screw 16 is caused to advance or to retractby turning the same through nut 17; thus, brake spring 14 can be more orless compressed. Support spring 13 will be more or less compresseddepending on weight of bobbin: as a result, spacing between brake disc12 and screw head 16 will vary and compression of brake spring 14 willvary accordingly. Compression of brake spring 14 can be brought back toan exact value by adjusting screw 16.

At the same time, braking will hence be accomplished, still inconnection with the bobbin weight.

In order that the brake of a set of bobbin holders be adjusted to thesame value, a scale having graduation marks 19 has been indicated at theupper end of screw 16, so that, depending on compression of spring 14said marks 19 will project to a larger or lower extent from the upperend of hollow screw 3. Thus, said upper end will act as a pointer forthe adjusting scale of the brake. It-is thus possible to adjust rapidlyand at the same value 4 an entire set of bobbin holders without havingto take them away.

What is claimed is:

1. A bobbin holder for fastening yarn bobbins to a bobbin creel,comprising two movable plates for bobbin clamping, exiting from sideslots in the bobbin holder, a centering ring and an adjustable brakingdevice, characterized in that the movable plates are of a differentlength and pivoted to each other at the upper end thereof; the upper endof said longer plate being provided with two opposite projecting partsor elements, adapted to be alternatively engaged by an inner rib of thecentering ring during the fastening operation of the bobbin, saidbraking device being directly adjustable from outside.

2. A bobbin holder according to claim 1, characterized in that the feetof the movable clamping plates are in the form of steps, and arespective pin located at the bottom of the bobbin holder for guidingsaid feet during movement.

3. A bobbin holder according to claim 1, characterized in that saidbraking device is adjustable from outside and comprises a first hollowscrew secured to the bobbin creel, a second coaxial screw movable withinthe former, which screws exit at the top of the bobbin holder, a brakingspring bearing with its lower end on the head of said second screw andwith the upper end on a braking disc; said second screw havinggraduation marks at the outer end thereof for adjusting the tension ofthe braking spring.

4. A bobbin holder according to claim 3, characterized in that in orderto adjust the braking effect said second screw has a threaded section atthe lower end thereof, screwing on a corresponding threaded section atthe lower inner portion of said first hollow screw, so that on turningsaid second screw the compression of the braking spring can be varied.

References Cited UNITED STATES PATENTS 3,005,602 10/1961 Whitehead etal. 242-1302 3,331,567 7/1967 Noguera 242-1302 LEONARD D. CHRISTIAN,Primary Examiner.

